Folding box



March 10, 1931. AIEg 1,796,035

FOLDING BOX Filed Oct. 22, 1928 y, [LAW Inventor:

Patented Mar. 10, 1931 UNITED STATES GUSTAV MAIER, OF SGHRAMBERG, GERMANY FOLDING BOX- I Application filed October 22, 1928, Serial No. 314,183, and in Germany October 24, 1927.

This invention relates to folding boxes particularly made of pasteboard, board carton or like materials, the interlocking joints of which being made of tongues punched out of the material ofthe box and engaging slits of adjacent parts of the same. Folding boxes of said kind may be laid flat for purposes of being packed, or for transit, or the like, and only require finally mounting together when they are brought to the place of using them. The principal feature of such an arrangement is that the construction of the box may be quickly and easily carried'out and at the same time an interlocking arrangement is obtained which may be relied upon against any un desired loosening of the interlocking means.

One object of the invention is to provide a folding box'capable of meeting said require ments and being characterized by the fact that a member or nose has been pressed out of the tongue serving as a stop which abuts against the edge of the slit so that the arresting of the tongue in the slit will be securely efi'ected. Thus in accordance with the inven tion a suitable abutment action of said mem her or nose pressed out of the tongue will be obtained by providing a cut in the stop edge of said member by means of which a sharply edged limitation will be given to said member so that a safe abutment effect in face of the edge of the slitwill be secured,

Another mode of carrying out the inven tion consists in that the cut serving for engaging the tongue tra-pezoidally projects with its intermediate part which after the introduction of the tongue serves as anabutment for the member pressed out of the tongue and the pressed out member of the fastening nose is situated behind the base line of the tongue. By means of this arrangement a greater security against the danger of the ton ue breaking over in the longitudinal direction of its base line will be obtained.

1 A. further more advantageous mode of carrying the invention into practice consists in that on the tongue as well as on the abutmentedge of the introduction slit members or noses are pressed out and proJecting in opposite directions, Thus by a relatively small depth of pressing out-and therefore a may also be produced by a simple out. For

the purpose of facilitating the introduction of the tongue into the cut the latter may be, according to the invention, extended at its ends beyond the width of the tongues. Said extension may be made either rectilinear or consist of circular cuts or notches made inthe corners of the introductive slit. By this means an easy spreading out of the slit during introducing of the tongue will be efi'ected and security against tearing in of the corners of the tongue is given as the bending up of the corners of the slit does not take place directly beside the side edges of the tongue but along a straight or curvilinear, laterally disposed extension of the slit.

In constructing folded boxes provided with the new interlocking means special shifting movements of the walls of the box do not need to be carried out. The assembling of the interlocking parts may be carried out without any tool at least just as rapidly as, for example, by stitching them together by means of a machine, so that the box is particularlysuitable for the packing up of goods made in manufactories of blotting products or the like. A further advantage consists in the fact that the interlocking parts may be creatfact that the nose-like member with regard to its formation by'pressing it out of the face of the tongue, possesses a. certain elasticity which facilitates the insertion of the tongue into and through the incision of the nei hboured side flap. Moreover the nosedie member oifers the advantage that with re;

v gard to the fact that the abutment is formed by means-of the edge of the member projecting freely out of the level of the carton, any

tendency of widening the slit after the tongue has been inserted, is avoided, so that no tearing up of the ends of the slit can enter. In .the companying drawing several modes of carrying out the invention into practice are showm. s 9 Figure 1 is a perspective representation of a folding box the cover part of which be.- ing removed.

Figure 2 is a plan View of the interlocking arrangement of the corners made before assembling.

Figure 3 lar corner interlocking arrangement after as sembling. I Figures 4 and 5 represent modes of constructing the corner interlockings provided with two pres'sepl out members.

1/ Figure 6 is a sectional View of the interlocking parts after asseinbling.

Figures ,7 and, ,8 are further examples of constructing thecorner joints. L Referring specially to Figures 1, 2 and 3 of the drawing the transversal walls lof the box are provided with tongues formed by accordingly punching out the edgeof said walls during one and the same step of o oration.

Each tongue has in the direction 0 its base line 4 a short cut 5 by means of which sharply edged abutment faces areformed on the rear of the arresting nose 6*pressed out in the tongue. v

A slit 7,- ordinarily produced by a simple 2 out, is provided in the opposite folded joint part 2 for engaging the tongue 3. .As soon as. the tongue 3 has been introduced into the 0 slit 7, the nose 6 with its rear edge, lying in the slot 5, formsa reliable stop in face of the cut edge of theslit 7 and prevents the loosening of the interlocking parts. According to Figures 4 and 5 the tongue 3 isprovided with a nose 6 and the cut 7 in the folded joint part 2 has a ,nose 8. Thus a shows in a sectional view asimiparticularly reliable securing of the interlocking joint against loosening will be obtalned as represented by Figure 6.

In the afore described modelof construcl tions'the introductive slits 7 are'provided on their ends; either wlth semicircular 11101810118" 9, Figure}, 01" with circular cuts 10, Figure ing out o of the tongues and to prevent the tearing in' ofthe slits at the corners of the same.

Figure 7 shows'an interlocking joint 2 having an angular slit 11 with aprojecting intermediate part. In this case the nose 6 is situated in the rear of the base line 4 of the tongue 3 .,in a-corresponding distance of about 5, for the purpose offacilitating the spreadthe slits during the introduction.

free corner 12 on the tongue. Inthis case after completed introduction of the tongue 3 intethe slit 7 the rear limiting-face of the nose G es well as the free tongue corner 12 Instead of providing the new interlocking joints at the cornersof folding boxes made of board carton, they may be, of course, situated at other points of the walls, bottoms or covers of the same. Moreover several abutment noses may be pressed out on the tongues.

What I claim asnew is 1. Folding box comprising interloekin joints consisting of tongues inserted into an through slits of the side flaps and provided [with a nose-like member pressed out of the I face of the tongue and-forming a hump :of 35 about semi-globular shape projecting out of the level of the carton and adapted when the tongue is inserted into the slit to form by means of itsfree projecting arched edge an {W abutment for the tongue in said slit.

2. Folding box comprising interlocking joints consistin of tonguesprovided with a nose-like mem er of about semi-globular shape, adapted when the tongue is insertedinto the slit of the neighboured side flap, to on form by meansof its free projecting edge an abutment for the tongue, the abutment ed e of the said slit having a similar nose-1i e member pressed out'of the face of the said side flap and projecting when the tongue is m" inserted into the said slit, with its free edge inthe opposite direction to that of the noselike niem er of'the tongue.

3. Folding box comprising interlocking joints consisting oftongues inserted into and 101;

through slits of'the side fia s and provided g on the base at one side of t e same with an incision and near the opposite edge with a nose-like member pressed out of the face of the tongue and forming a hump of about no semi-globular'shape having an arched edge projecting freely out ofthe level bf the tongue. V

In testimony whereof, I have signed my name to this specification at Stuttgart, Germany, this 8th day of October, 1928.

- GUSTAV "MAIER.

its otherend with an'incision 13 forming'a 

